William l



(No Model.)

W. L. VOELKER.

ELECTRIC LAMP.

No. 263,257. Patented A11g.22, 1882.

UNITED STATES PATENT OFFICE.

VILLIAM L. VOELKER, OF MORTON, PENNSYLVANIA, ASSIGNOR T0 JOHN H. IRWIN, TRUSTEE, OF SAME PLAGE.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 263,257, dated August 22, 1882.

Application filed January 23, 1882.

To all whom it may conccrn Be it known that I,.VVILLIAM L. VOELKER,

'of Morton, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in Electric Lamps, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, and to the letters of` reference marked thereon.

My invention relates especially to the construction and arrangement ot' incandescent electric lamps, and has for its object the production of a device easy to construct and simple to operate, and wherein provision is made for regulating the amount of light given by the lamp without the aid of useless artificial resistance, but by storing the excess of elec trical energy in secondary batteries for use with other electrical devices; and my invention involves certain novel and useful combinations or arrangements of parts and peculiarities of construction and operation, all of which will be hereinafter first fully described, and then pointed out in the claims.

In the drawings, Figure 1 is a sectional view of my lamp, showing the method of arrangement; and Fig. 2 is a horizontal sectonal view through the support at the base of the lamp.

Like letters of reference, Wherever they occur, indicate corresponding parts in both the figures.

A is the globe or vacuous bulb of the lamp, provided at bottom with tube A2, titting into a supporting-thimble, D, constructed of any suitable non-conducting material.

B is the incandescng filament ot1 carbon inclosed within the bulb, and held in place by the conductors O O', sealed within the support A'.

Upon each side of thimble D are aftixed Springs E E', having electrical connection with the conductors to the interior of the lamp.

Thimhle D fits into a socket in bracket G, prepared for its reception.

As thus constructed the lamp may be lifted from its place in the bracket at pleasure, the springs E E' making electrical connection with metallic contactpieces F F', afiixed Within the socket in G. Meta-llic piece E has electrical connection with the wire H of the circuit and E' With the Wire H', and are so ar- (No model.)

ranged as to establish the circuit through the lamp when placed in position upon the bracket.

Afh'xed to the lamp-socket, insulated from each other, are one or more strips, 1*, having electrical connection with the cups of a secondary battery, J, by means of Wire I 1/, run ning from the battery to the line.

When constructed and arranged in accord-V ance with the foregoing description electrical energy heretofore wasted in devices of this Character' by the use ot' artiticial resistance may be saved, and the light of the lamp may be readily regulated and turned down or out by simply turning the lamp in its supportingsocket. When the lamp is in position, with its Springs in contact with F and F', the filamentofcarbonisthoroughlyincandescent. By turning the lamp a part of a revolution in its socket contact is made with 1*, the conductor to the secondary battery. Theinternalresist- 7c ance of the secondary battery reduces the strength of the current sufficiently to heat the carbon bright red, and by adding a number of strips 1*, with corresponding battery-connections, a varying resistance may be obtained, by which the light given by the lamp may be effectually regulated. The electrical energy, instead of being wasted, is stored in the secondary battery, and may be utilized for annunciators, burglar-alarms, or any device requiring electricity for its operation. In ex ting'uishing the lamp connection is broken by simply turning the lamp half around in its socket.

Having now fully described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-- 1. In combination, a main circuit, an incandescent electric lamp in one branch thereof, a secondary battery in other branch thereof, and a switch in the socket of the lamp for connecting either branch with the main circuit, subst-antially as described.

2. In combination with a secondary battery,

a supporting-socket for incandescent electric lamps, having contact-pieces F F' and Springs E E', electrically connected with the line, and strips 1*, electrically connected with the secondary battery, substantially as described.

3. In combination, a secondary battery, an ro) incaudescent electric lamp capable of revolution in its socket, and a socket provided With oontact-pieces F F', Springs E E', and strips 1* for the purpose of making Aelectrical connection with the secondary battery by a partial revolution of the lamp, thereby diminishing or extinguishing the light of the lamp or regulating the current to a series of lamps, substantially as set forth.

4. In combination, a secondary battery and an incandescent electric lamp removable from its socket and capable of revolution Within the same, and provided With contact-pieces F F' and Springs E E' for the pnrpose of breaking or making electrical connection with the line, and having strips 1* foI` the purpose of mak- WILLIAM L. VOELKER.

Witnesses:

- GARRETT ESMEDLEY, I

HoRAoE R. MANLEY. 

